Análise aerodinâmica de uma turbina eólica de eixo horizontal para microgeração de energia elétrica em ambientes rurais

Abstract

The research aims at performing the aerodynamic analysis of some 4digit NACA airfoil applied to a 3-blade horizontal axis wind turbine with 4m diameter to evaluate the project performance and feasibility. The NACA airfoil 0012, 0015,2412 and 4415 were chosen through bibliographic surveys due to their use in other projects and demonstration of relevant characteristics. The aerodynamic analysis was performed by the QBlade software, which uses as a mathematical method , the BEM methodology and the Euler-Bernoulli beam theory. Thus, it was possible to obtain the relationships between the lift coefficients and their respective angles of attack and lift coefficient, obtain the power coefficient and the maximum torque, and simulate the effects of the normal and tangential static forces generated by the lift and drag acting on the blade. Throug the analysis, it was observed that, for the evaluated parameters, the rotor with airfoil 4415 presented better results of the relations between the coefficients of support and drag, support and angle of attack and the quotient between support and drag in relation to the angle of minimal attack rotation, thus, the 4415 airfoil would enable the project implementation.